Emergency-brake.



Patented Dec. 15, 1914.

4 SHEETS-SHEET 1.

C. H. DAVIS.

EMERGENCY BRAKE.

APPLICATION FILED FEB. e, 1914. 1 1 20,796

[ENE] F n THE NORRIS PETERS c0. PHoToilTI-la, WASHINGTON. D4 C.

CzH. DAVIS.

EMERGENCY BRAKE.

APPLICATION FILED FEB. 9, 1914.

1,120,796 Patented Dec. 15, 1914.

4 SHEETSSHEET 2 attommg HE "O FE ERS 50.. PMOTOJJTHQ. WASHINGTON. D. r

C. H. DAVIS. EMERGENCY BRAKE.

APPLIOATION FILED FEB. 9, 1914.

1,120,796. Patented Dec.1' 5, 1914.

4 SHEETS-SHEET 3.

Chm nce DQVIS "HE NORRIS PETERS 60., PHOTO-LITHQ. WASHINGTON, D. C

0. H. DAVIS. EMERGENCY BRAKE.

APPLICATION FILED THE. 9, 1914- 1,120,796. Patented Dec. 15,1914.

, 4 SHEETS-SHEET 4.

Yell/I l/II, [I ll Ill Dams I marcfice H.

THE NORRIS PETERS c0 F'Horoiln-wuwAsHlNcroN. D. C.

(141 mm: I

UNITED STATES PATENT onmon. A

CLARENCE I-I. DAVIS, or BENGE, WASHINGTON.

EMERGENCY-BRAKE.

Application filed. February 9,1914. Serial Nb. 817,609.

To all wit-omit may concern: Beit known that I, CLARENCE H. DAVIS,

a citizen of the United States, residing at Benge, in the county'of Adams andState of 5 Washington, have invented new and useful Improvements in Emergency Brakes, of which the following is a specification.

This invention relates to an improved operating means for emergency brake shoes of that character wherein the shoe acts to apply emergency brakage when interposed between the rail and the truck wheel.

- It is one Of the objects of this inventlon to provide a mounting for emergency brake shoes of this character, which will makethe same applicable to. trucks which p ivotally or turnably support thecar body, the device of my invention being mounted partly upon the truck and partly upon the car body 1n such a manner that brakage can be applied even when the car is. negotiating a curved stretch of track.

.A further object of the invention is to provide an improved lever operating dBVlCG mounted to swing about an axis fixed with respect to the body, and so connected with the shoe mechanism as to render the latter operative by the former irrespective, of the position whlch the truck causes the shoe and its mechanism to assume with respect to the car body.

Other features and objects of the invention will be more fully described in connection with the accompanying drawings, and will be more particularly pointed out in and by the appended claims.

Inthe drawings :-Figure 1 is a view in side elevation of a car illustrating the application of one form of the device of my invention thereto. Fig. 2 is a longitudinal vertical section, with parts in elevation taken through a portion of the car near the front wheel of one of the trucks and showing the emergency shoe in an inoperative position; Fig.3 is a View similar to Fig. 2

showing the shoe in an emergency braking position. Fig. 4 is a. view in plan of the parts shown in Figs. 2 and 3. Fig. 5isa perspective view of the emergency shoe and itsoperating device Fig. 6 is a sectional view on line 66 of Fig. 8. Fig. 7 is a sectional view on line 77 of Fig. 4:. Fig. 8 is a detached view of an improved form of bell crank lever, showing the same in side elevation, with parts in section. Fig. 9 is .a

Specification of Letters Patent.

Patented Dec.

plan viewof said lever showing the position of the same whenthe car is runningpn straight stretch of track. Fig. 10 isa view similar to Fig. 9," showing the position which the lever assumes when the caris roundmg acurve.

Like characters of, reference designate similar parts throughout" the difierent figures of the drawings] i As shown,the carbody is indicated at l and the truck fram'esjatQ, the truck wheels.

being indicated at 3."

Emergency brake shoes are designated at 4; and the same are shaped on their lower faces 5 to. sl'ideon the tread of the rail, and the said shoes are of that type in which the wheel rides up on the shoe when the latter 1s m an operating position. Thus the shoe f4: tapers, asat 6, and theinclineterminates in a curved fwheeltr'ead engagin portion 7 wheel with whicliit cooperates. I The shoefil' 1s providedfwith a flange 8 for engagement slightly in advance of. the extremity of the tapered portion 6, as indicated atlO, so as to p ermitthewhee'l to rideiu'p onto the shoe and prevent engagement of the wheel flange with thesho'e fiange 8. v i

.Shoe hanging mechanism is provided, which comprises a yoke 11 having downwardly extending forks 12 in which a slotted shoe supporting-guide 13 is hung. The shoe supporting guide 13 is provided with a slot 14: having retaining and preferably downwardly extending portions lfi and 16 oifset therefrom. The shoe 4 is connected with and hangs pendent from two pairs of hanger straps 17 and 18, the upperends of which. are connected by pins 19 "and 20, which are adapted to seat in the offsets 15 and 16 and move rearwardly in the slot 14:. WVh'en the shoe is" in the position shown in Fig; 2, the pins 19 and 20 will 'seat'inthe offsets 15 and 16, but when the yoke llis lowered so as tofengage the shoe 4: with the with one side" of the headfiofthe rail!) and the flange 8 is interrupted at its rear end rail 9, thejpins19 and 20 will be projected into the slot 14 and will be free tosliderelatively to the member 13 as" the latter ad-- vances. The slot is proportioned so that the wheel will run up onto'the' shoe 4 be 75 having a rad us equal to the radius of the upon'the hanger of the shoe at all during emergency action. When the car has been brought to a position of rest, it will either be positively backed off from the emergency shoes, or allowed to back off and'this will return the yoke 11 and the member 13 to the position shown in Fig. 5, with respect to-the pins 19 and 20, so that when the yoke 11 is elevated, the pins will be seated in the offsets 15 and 16, which will serve to efiectively hold the emergency shoes in the desired advance position. v

' In order to at all times maintain the emergency shoes inoperative relation with the truck wheels either when the same are running on a straight orcurved stretch of track, I provide positioning or guiding means for the shoes, which are rigidly mounted upon the truck. I

As illustrated, 21 designates a U-shaped frame which is secured to the'truck frame at 22 and which extends forwardly with respect to the truck and closely adjacent the outside straps l7 and 18. Bars 23 extend closely adjacent the inside straps 17 and 18, and are secured at their forward ends to the U-shaped frame 21and at their rearward ends to the truck frame 2. Thus it will be seen that this shoe guide mechanism onthe truck frame will always maintain the shoes in predetermined relation withrespect to'the wheels,*so that when they are lowered, they will always be in a position for correct operative engagement with the treads of the rails.

I provide guiding means for each brake shoe mechanism to guide the same in up and down adjustments and as shown, said guiding means comprises a frame composed of longitudinal members 2e connected by transverse members 25. Thetransverse members 25 are connected by hanger members 26, as will be clearly seen'by reference to Fig. 4E. The longitudinal members 2e are provided with guide arms 27, provided with guide openings for slidably receiving yoke bars 28 on the yoke 11, whereby the yokes 11 may be elevated or lowered.

It will be seen that the guide frame just described must also shift with the shoes on relative movement of the truck with respect to the body of the car, and therefore I movably support the guide frame mechanlsm upon the car body to afford relative movement therebetween.

As shown, tracks 29 and 30 are mounted 'on the car body and are arched in form about a center coincident with the turning axis of thetruck with respect to the car body; The tracks 29, and 30 are of hollow construction and are provided with supporting flanges 31 and 32 on which rollers 33 and 31- are supported, the rollers 33 and 34 being preferably guided by the opposing walls of the hollow track structures. The rollers are 'mounted on hangers 35 and 36, which are secured to the hanger members 26,

.Qthe brake shoes are raised and lowered.

An operating lever 37 is mounted to swing about an axis fixed with respect to the car body and shown in the form of a pivot 38 carried by a bracket 39. The lever 37 is provided with a hand grip pivoted thereto and indicated as a'whole at 40, for operating a lock 41 to lock the lever in the position shown in Fig. 2, it being clear that it will be unnecessary to lock the lever when the same is in the position shown in Fig. 3. The lever 37 is connected by a link 12 with one end of an arm a3 of a bell crank lever, the other armof which is indicated as a whole at 14k. Said lever is mounted to swing about an axis, which is fixed with respect to the car body and which is shown in the form of a studshaft 45 supported by a hanger 4E6 pendent from the car body.

Thefree end of arm 44 is connected with an elevating and lowering rod l7, whichhas its ends mounted in openings 48 in uprights 49 of yokes 11, as will'be clearly seen by reference to Fig. 1. The bore of the arm H, for receiving the rod 47, tapers outwardly toward its ends from a central crown annulus 50, which crown annulus is approximately the diameter of the rod so as to snugly fit the same. The outward tapers provide for engagement with the rod 17, without binding, irrespective of the angular disposition'of the rod with respect to the arm bore, within certain limits. The position shown in Fig. 9 illustrates the mechanism when the car is running over a straight stretch of track, and the position shown in Fig. 10 illustratesthe parts as they would appear when the car is rounding a curve.

' Because of the fact that a5 is carried by the car body and that rod 47 not only moves into and from parallel relation with 45, but toward and away therefrom, extensibility is required between 47 and 4:5. Therefore, arm e4 comprises telescoping sections, one thereof comprising the head 51 and shank 52, a

to thestud45, and also any relative movement of these parts from each other.

It is believed. that the advantages and utility of my invention will be clear from theforegoing description, and while I have herein shown and described one specific form of my invention, I do not wish. to be limited thereto except for such limitations as the claims may import. I

I claim I 1. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices pendently supvices in said guiding frame, substantially as described.

2. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices pendently supporting said shoes, a frame for guiding said devices, means arched on the pivotal axis of the truck and carried by the body for movably supporting said frame, means arched on the pivotal axis of the truck and carried by the body for movably supporting said shoes in range for engagement with the tracks, and means for elevating and lowering said supporting devices in said guiding frame, substantially as described.

3. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices supporting said shoes, a frame for guiding said devices into and out of operating positions and movably mounted on the car body, means carried by the truck for maintaining said shoes in operative range with the tracks, and means for elevating and lowering said supporting de vices in said frame, substantially as de- SCIIbGCl.

a. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices supporting said shoes, a frame movable horizontally abreast of the bottom of said car body for guiding said devices into and out of operating positions, means for maintaining said shoes in operative range with the tracks, and means for elevating and lowering said supporting devices in said guiding frame, substantially as described.

5. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoe devices, means movably carried by the car body for guiding said shoe devices into and out of operative positions and means for maintaining said shoe devices in operative range with the tracks,

substantially as described.

6. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoe devices, means movably mounted on the body for guiding said shoe devices in vertical movement, means carried by the truck for maintaining said shoe devices in operative range with the tracks,and means mounted upon an axis fixed withrespect to the body for elevating and lowering said shoe devices, substantially as described.

7. In an emergencybrake ;mechanism, a car body, a truck pivotally supporting the same, emergency brake shoes, and mechanism slidably mounted on the bottom of the car body transversely. thereof and including means carrying said shoes and providing for horizontal movement of the shoes with .respect to said means intooperative relation between the wheels and. tracks under frictional engagement between said shoes and they tracks, substantially as described.

8. In an, emergency brake mechanism, a car body, a truck pivotally supportingthe same, emergency brake shoes, and mechanism slidable transversely of the .car body forv suspending said shoes and including shoe carrying means providing for. horizontal-movement of the shoes longitudinally of the-car body into operative positions, substantially as described. Y

a 9. In an emergency brake mechanism, a

truck, a car bodypivoted thereon, emergency brake shoes slidably carried by the car body, and means for shifting said shoes into operative positions, substantially as described. v

1.0. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes slidably carried by the car body, and means mounted on the car body for shifting said shoes into operative positions, substantially as described.

11. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency-brake shoes, means for holding said shoes in range for engagement with the tracks, and means movable about an axis fixed with respect to the car body for raising and lowering said shoes and including a pivoted lever extensible in the direction of its length, substantially as described.

12. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, means for holding said shoes in range for engagement with the tracks, and means movable about an axis fixed with respect to the car body for raising and lowering said shoes and including a bell crank lever on such axis having an arm pivoted thereto and extensible in the direction of its length, substantially as described.

13. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices for holding said shoes in parallel relation with respect to each other, means for holding said shoes in operative relation with respect to the tracks, a

lifting rod connected with said devices, and a bell crank lever mounted to turn about a fixed axis on the car body and having one arm provided with an outwardly tapered bore for receiving said rod and being extensible in the direction of its length, sub- .stantially as described.

1%. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, devices for holding said shoes in parallel relation with respect to each other, means'for holding said shoes in operative relation with respect to the tracks, a lifting rod connected with said devices, and a bell crank lever mounted to turn about a fixed axis on the car body and having one arm pivoted and extensible in the direction of its length and provided at its free end With an oppositely tapered bore for engagement with said rod, substantially as described. I

15. In an emergency brake mechanism, a truck, a car body pivoted thereon, emergency brake shoes, means for holding said shoes in range for engagement with the tracks, and extensible .pivotal means carried by the car body for raising and lowering said shoes, substantially as described.

16. In an emergency brake mechanism, a

truck, a car body pivoted thereon, emergency brake shoes, means for holding said shoes in range for engagement with the tracks, and means carried by the car body and including a lever extensible in the direction of its length for raising and lowering said shoes, substantially as described.

17. In an emergency brake mechanism, a trnck,a car body pivotedthereon, emergency brakeshoes, means for holding said shoes in range for engagement with the tracks, and means movable about an axis fixed with respect to the carbody for raising and lowering said shoes and including apivotedly connected lever, substantially as described.

In testimony that I claim the foregoing as my own, I hereby aiiix my signature in the presence oftwo subscribing Witnesses.

CLARENCE H. DAVIS.

lVitnesses Jar-ins M. DAvIs, FRED. R. ELLIS.

Copies of this patent may be obtained for five cents each, byiaddressing the Commissioner of Patents.

'Washington, 'D. G. 

